4 



296 ' THE ANNELIDA POLYCHAETA. 



The parapodia are paler and the ch-ri and ventral glandular areas typically white. 



The species is represented by two incomplete specimens, each consisting 

 of the anterior portion of the body. One of these is 23 mm. long, with a maximum 

 width of 2 rmn., and is composed of thirty-six somites. The other, which is but 

 slightly shorter, consists of thirty-nine somites. 



The prostomium is small, proximally subcyUndrical, and distally convexly 

 or hemispherically rounded, with the ventral surface more flattened. In anterior 

 view the tentacles are seen to be arranged in a circle. The frontal tentacles 

 are rather small, short, and stout, distally rounded, pale colored processes 

 attached very close together but not quite contiguous. They are much smaller 

 than the palpi. The latter are bluntly conical, well rounded, proximally stout 

 bodies which are very close together and project ventrad from the under surface 

 of the prostomium. The dorsal tentacles have the usual general structure, 

 consisting of a distinct, stout, strongly annulated ceratophore and a long, smooth, 

 distally tapering style; the ceratophores in comparison with those of other species 

 are short. The anterior paired tentacles are short, reaching upon the second 

 somite; the style is nearly three times as long as the ceratophore; the cerato- 

 phore consists of two short proximal articles and a smooth distal region equalling 

 about half the total length. The outer posterior paired tentacle intact reaches 

 at present to somite IX, but the tip is broken off and it may have reached at 

 least as far as XI, but judging from its slendemess at the broken end probably 

 not as far as the median tentacle; the ceratophore appears as thick as long 

 and consists of three annuli, of which the most distal is longest. The median 

 tentacle reaches to somite XIII; it is stouter throughout and longer than the 

 posterior laterals; the ceratophore is decidedly stouter than those of the laterals, 

 but it is proportionately short, as thick as long, and consists of four annuli 

 (or of three, the division between the two distal annuli being rather obscure). 

 (Plate 42, fig. 1). 



The peristomium is abruptly much wider than the prostomium, but it is 

 very short, in the middorsal region being only about a third as long as the 

 prostomium. Its anterior margin above is straight or but slightly curved at 

 the middle. Laterally it bulges forward convexly to embrace the prostomium. 

 The entire ventral surface is set off and elevated as the lower lip; this is wholly 

 smooth; its anterior margin is straight, or nearly so, but one specimen shows a 

 small V-shaped incision at the middle line. The tentacular cirri are attached 

 widely apart; each is slender and tapered to a point, and reaches beyond the 

 base of the corresponding posterior tentacle, but does not wholly attain the 

 anterior end of the prostomium. (Plate 42, fig. 1). 



